Quiz on Research Variables

What is a variable in research?

• A fixed quantity that does not change

• Anything that has a quantity or quality that varies

• A type of research design

• A method of data collection

Which of the following is an example of a dependent variable in the tomato growth study?

• Amount of sunlight

• Type of soil

• Growth of tomato seedlings

• Amount of water

If a researcher wants to test the effect of sunlight on tomato growth, which variable is manipulated?

• Dependent variable

• Extraneous variable

• Independent variable

• Confounding variable

What is the role of extraneous variables in an experiment?

• They are the main focus of the study.

• They are controlled to ensure accurate results.

• They are the variables that are manipulated.

• They do not affect the outcome of the experiment.

Which of the following best describes a confounding variable?

• A variable that is intentionally manipulated

• A variable that is held constant

• A variable that affects the dependent variable but is not controlled

• A variable that is measured in the study

What type of variable is the number of fruits produced by tomato plants?

• Independent variable

• Continuous variable

• Discrete variable

• Qualitative variable

Which of the following is an example of a continuous variable?

• Number of students in a class

• Height of tomato plants

• Type of soil used

• Color of tomato fruits

In a study measuring temperature, which type of data is being used?

• Nominal data

• Ordinal data

• Interval data

• Dichotomous data

If a researcher ranks students based on their test scores, what type of variable is being used?

• Nominal variable

• Ordinal variable

• Continuous variable

• Discrete variable

Which of the following is NOT a characteristic of a ratio variable?

• It has a true zero point.

• It can take negative values.

• It can be measured in whole numbers.

• It can be measured in fractional values.